Carolina Panthers owner Jerry Richardson, left, and Pittsburgh Steelers running back DeAngelo Williams, a former Panther, greet one another prior to the team's preseason game in 2015. Williams was somewhat critical of the Richardson’s Panthers during a social media rant last week. Jeff Sinerjsiner@charlotteobserver.com

Carolina Panthers owner Jerry Richardson, left, and Pittsburgh Steelers running back DeAngelo Williams, a former Panther, greet one another prior to the team's preseason game in 2015. Williams was somewhat critical of the Richardson’s Panthers during a social media rant last week. Jeff Sinerjsiner@charlotteobserver.com

Twitter fight: Former Panther DeAngelo Williams vs. Panthers fans

Former Carolina Panthers running back DeAngelo Williams got in a Twitter war with some Panthers fans last week, that started with Williams’ quoting a tweet from Observer sportswriter Joe Person, who tweeted about Panthers president Danny Morrison resigning.